Determination of Cadmium and Lead in Tap Water by Graphite-Furnace Atomic Absorption Spectrometry after Preconcentration on a Finely Divided Ion-Exchange Resin as the Pyrrolidinedithiocarbamate Complexes.

  • ANEZAKI Katsunori
    Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
  • CHEN Xueze
    Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
  • OGASAWARA Tamotsu
    Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
  • NUKATSUKA Isoshi
    Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University
  • OHZEKI Kunio
    Department of Materials Science and Technology, Faculty of Science and Technology, Hirosaki University

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Other Title
  • Determination of Cadmium and Lead in Ta

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Abstract

A rapid and simple preconcentration method based on the combined use of ammonium pyrrolidinedithiocarbamate (APDC) and a finely divided anion-exchange resin has been described for the determination of trace amounts of cadmium and lead by graphite-furnace atomic absorption spectrometry (GFAAS). Cadmium- and lead-APDC complexes were extracted simultaneously on the resin at pH 6. The resin particles holding the cadmium- and lead-APDC complexes were separated by filtration and dispersed in 1.0 ml of 0.1 mol l-1 hydrochloric acid containing 100 μg of palladium(II). The resulting suspension was introduced directly into the graphite furnace by an automatic sampler. The detection limits of cadmium and lead in a 150-ml sample aliquot were 0.17 and 5.7 ng l-1, respectively, based on three-times the standard deviation of blank values. The proposed method was applied to the determination of nanograms per liter levels of cadmium and lead in tap water.

Journal

  • Analytical Sciences

    Analytical Sciences 14 (3), 523-527, 1998

    The Japan Society for Analytical Chemistry

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